Honu

Honu is a family of languages built on top of Scheme. Honu
syntax resembles Java. Like Scheme, however, Honu has no fixed syntax,
because Honu supports extensibility through macros and a base syntax
of H-expressions, which are analogous to S-expressions.

The Honu language currently exists only as a undocumented
prototype. Scheme’s parsing and printing of H-expressions is
independent of the Honu language, however, so it is documented here.